William g



@with gisten getint @ffies lVILLlAM G. ADAMS, 0F FRANKLIN,MASSACllSET'iS.

v Letters Patent .Na 64,397, dated jlfag 7, 1857 IMPROVED GOMPOUNDSTRUCTURE OE RUBBER AND FIBRE FOR BELTS AND OTHER PURPOSES.

dige .Sflgrhiue refresh in in ilgise ctters ntrnt mit 'milking gni oftir Stuur.

TO ALL WHOM IT MAY CONCERN:

Be it known that l, lVILLIAM G. ADAMS, of Franklin, in the county ofNorfolk.,- :rnd State oi" lliassschul l l i sctts, have lnvented :tulmproved Compound Structure of Vulcunxzed Rubber anni Fibre and l dohereby dechire tlm't the following, taken in connection with thedrawings which accoinpuny und form part oi' this specification, is adescription of my invention suiiicient to enable tllose skilled in thenrt to practise il.

This invention was called forth by the development of defects in theweer :rml operation of some of the ordinary Forms of rubber andrubberbelting, in my employment thereof as s conveying surface for nrice-huliiug mill, such forms resisting but very imperfectly theabrasion to which they were subjeec l. Where woven fibrous material hashcetofore been used with rubber vto give strength to the. structure, thefibres boih of worp 'find wefthave been so disposed as to be nearlyparallel to the wearing sul-thee of the rubber, and in this conditionthey weer rapidly, While onl)7 those fibres which` are disposed in thedirection o' :my tensile strain on the con:- 4pound structure areeiective in resisting such strain. As in rubber belting the .tensiles'rain is exerted in the direction of its length, the warp threads ofthe woven fabric therein are the only ones on which substantially thestrength of the structure depends; therefore in my improved structure, 1retain the warp threads in the direction in which tensile strength is tobe exerted thereon, and substantiallyY parallel with this wearingsurface, but have thetibres ot' the weft substantially at right anglesto said surface, and passing through or in the struct-Lire i'n thedirection of its thickness instead of across it in the usual wey. Itwill new be understood that nil; invention consists in a compoundstructure of vulcanized rubber and fibre, in which a portion of theiibrc is disposed yparallel to the wearing surface of the rubber, and inthe direction to aid in resisting tensile strains, \\'hile"the otherportion of' the {ibresris disposed substantially at right angles to saidsurfsee,` so as to present nt leastin part the ends of fibres to weerinstead of presenting onl)7 the sides of them.

' I msk'e rny improved structure as follows: For a base of operations Iprefer to use a metallic cylinder, which I cover with u thin sheet ofrubber or rubber compound in condition to be vulcanized by applicationof' heut, which condition is too well known to need description here.It' itis desired to have onesuri'uce of the structure cloth-covered,then u layer of cloth must be irst applied to the cylinder beforewinding the sheet of rubber thereon. .f then take tape or othernarrow-ware goods of width sufficient, in addition to the thickness ofthe material already on the cylinder, to ineke up the thickness of thestructure required, und wind this tape, and a strip of rubbr of equalwidth therewith and in the condition before named, edgewise on therubber upon the cylinder, continuing the winding till the requisiteWidth is obtained. It is obvious thht between an)f two adjacent parts ofthe tape there will be e strip of rubber. To obtain narrow strips of'textile goods, clotiu'such as duck, may be stripped in the direetionot'its warp to desirable widths. New, by suitable application of heut Atothe cylinder covered as described, the said covering, or the rubber partthereof, will be vulcanized, and the fibres therein willlhave thedisposition substantial-ly as specified, and the structure will resistabrasive Wear better than any other of equal tensile strength with whichI am acquainted. The drawings show two sections of my improvedstructure, the parts in blue representing'the rubber, the 'parts in realthe weft threads or fibres, and the parts in black the werp threads orfibres'.

I ciaim a compound structure of vulcanized rubber and fibre, in whichthe disposition of fibre is substantially that specied. 4

Y WM. G. ADAMS. Witnesses:

J. B. Csosisr, FRANCIS Gouw.

